Finally a solution for the age old problem of how to let your pet heal in comfort. A great alternative to rigid elizabethan collars. Features: * Made of patented nylon fabric laminated onto 1/2 inch foam which is soft and yielding while being very sturdy and protective * Has elastic loops to thread the pets own collar through to keep the Comfy Collar secure in place and keeping it from being pulled off or from falling off. * Allows your pet to eat and drink in comfort, or collar can be folded back when eating and drinking or when checking wounds and irritations. * Velcro closures and tabs which adjust to many sizes and opens so you do not have to put pet's head thru Comfy Collar. * Reversible so you can change color on the outside or change if one side gets dirty * Both water resistant and repellent and is easy to wipe clean and dry. * Fold flat for easy storage. * Unique reflective binding to help protect you and your pet while going outside at night for walks and bathroom breaks. * More eco-friendly than the plastic e-collar Xlarge size fits pets with neck size from 21" - 25" The 30 cm measurement listed is the Diameter of the collar opening. The measurement from the collar out to the edge of the cone is 12" Sizing Tips: Is your dog's measurement between two sizes? Then figure out which size you need based on the location of the area you're trying to protect. If it's on the body (chest, neck, back, hip, stomach), order the smaller size to give your dog the most visibility. If it's on the tail, paws, legs, or eye, choose the next size up, which will be longer on the sides.